155005500 has 96 divisors (see below), whose sum is σ = 486158400. Its totient is φ = 38150400.

The previous prime is 155005489. The next prime is 155005523. The reversal of 155005500 is 5500551.

155005500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15526 + ... + 23474.

It is an arithmetic number, because the mean of its divisors is an integer number (5064150).

Almost surely, 2^155005500 is an apocalyptic number.

155005500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155005500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243079200).

155005500 is an abundant number, since it is smaller than the sum of its proper divisors (331152900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155005500 is a wasteful number, since it uses less digits than its factorization.

155005500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7984 (or 7972 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 21.

The square root of 155005500 is about 12450.1204813447. The cubic root of 155005500 is about 537.1748890257.

The spelling of 155005500 in words is "one hundred fifty-five million, five thousand, five hundred".